Lying outside the visible spectrum at its red end; -- said of rays having a longer wavelength (and thus less refrangible) than the extreme red rays, specifically those electromagnetic waves having a wavelength of between 700 nanometers and 1 millimeter.
relating to, using, or producing infrared radiation.
affected by infrared radiation; as, infrared detector; infrared film.
Part of the electro-magnetic spectrum between the visible range and the radar range. Radiant heat is in this range, and infra-red heaters are much used in sheet thermoforming.
Infrared radiation is part of the electromagnetic spectrum, often used for contactless heat transfer, e.g. solder reflow.
1) Of or relating to electromagnetic radiation with wavelengths greater than those of visible light and shorter than those of microwaves; 2) Producing, using, or sensitive to infrared radiation. Inorganic: 1a) Involving neither organic life nor the products of organic life; b. Not made up of organic matter. 2. Of or pertaining to the chemistry of compounds not usu. classified as organic. 3) Not produced by in normal growth: artificial. 4) Lacking structure or system.
Radiant energy with wave lengths that are longer than the wave lengths of the visible spectrum. Applications include photography, drying or baking materials in industry, medical heat therapy, heating food, etc.
Frequencies beyond the red end of the visible spectrum, i.e. frequencies with longer wavelengths than red light. Perceived by humans as heat. Commonly used for remote-control devices.
Often abbreviated to IR. The part of the Electro-magnetic spectrum with wavelengths ranging from ~100 microns (Far IR) to ~1 micron (Near IR) (1 micron is 1 millionth of a metre). The terms near and far just come from how close to the visible part of the spectrum it is. IR astronomy is beginning to become very important as detectors of IR radiation improve. Observing in the Infra-Red allows us to 'see' much cooler objects than we do in the optical (due to Wien's law). Also, IR radiation passes through interstellar dust far more easily than higher frequency radiation does (due to Rayleigh scattering) - Allowing us to see deep into dust clouds and other previously unexplored regions.